Crane.



G. A. TRUE.

CRANE.

APPLICATION FILED AUG-14,1911.

1 1% 29 Patented June 29, 1915.

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IIEI IED ETA IEE PATENT @FFIGE.

GEORGE A. TRUE, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALE TO NORTHERNENGINEERING WORKS, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

CRANE.

Application filed August 14, 1911.

To all whom it may concern Be it known that I, GEORGE A. TRUE, a citizenof the United States of America, residing at Detroit, in the county ofWVayne and State of Michigan, have invented certain new and usefulImprovements in Cranes, of which the following is a specification,reference being had therein to the accompanying drawings.

My invention relates to cranes and more particularly to ladle cranes.

The invention resides in providing the trolley carrying the main hoistwith an auxiliary hoist arranged on a traveling carriage which ismounted upon the main trolley, and further in the peculiar constructionand combination of parts as more fully hereinafter described.

In the drawings,Figure 1 is a front elevation of a ladle crane embodyingmy invention; Fig. 2 is a side elevation partly in section of the maintrolley; and Fig. 3 illustrates a modification.

A represents the main tracks usually running lengthwise of the buildingand B the traveling bridge thereon having suitable rails on its girdersfor the trolley C which carries the main hoisting mechanism D.

WVith this type of ladle crane it is desirable to have an auxiliaryhoist for tipping the ladle upon the same trolley as the main hoistingmechanism. Usually the trolley carrying the main hoist is provided witha stationary auxiliary hoist positioned adjacent one end of the trolleybut with such an arrangement the ladle may be turned or tipped in onedirection only. For certain uses however, it is necessary to have thehoisting mechanism so constructed as to permit the ladle to be tipped indifferent directions. I have accomplished this result by mounting theauxiliary hoist upon a carriage or auxiliary trolley which travels upona track carried by the main trolley.

The auxiliary trolley and the track therefor may be of variousconstructions but preferably the auxiliary trolley E is of the monorailtype and the track F for the auxiliary trolley is formed by an I-beamsecured to and suspended from the beams G of the main trolley C. Thetrack F may be either straight or curved. In Fig. 2 the auxiliary trackis shown as straight and extending parallel to the rails for the maintrolley,

Specification of Letters Patent.

Patented June 29, 1915.

Serial No. 64.3,937.

while in Fig. 3 a circular track F is illustrated which permits theladle to be tipped in any direction.

By suspending the track for the auxiliary trolley from the frame of themain trolley not only are the auxiliary trolley and its track soarranged as not to interfere with the mechanism carried by the maintrolley but the track for the auxiliary trolley can be readily appliedto the constructions of main trolley now in general use.

What I claim as my invention is:

1. I11 a ladle crane, the combination with a movable trolley including aframe and a main hoist carried by said frame and fixed in relationthereto, of a track upon the trolley and extending upon opposite sidesof the main hoist, a traveling carriage mounted on said track, and anauxiliary hoist upon said carriage, said traveling carriage beingactuable to variably position the auxiliary hoist upon either side ofthe main hoist.

2. In a ladle crane, the combination with a movable trolley including aframe and a main hoist carried by and fixed in relation to the frame, ofa track secured to and suspended from the trolley frame and extendingupon opposite sides of the main hoist, a traveling carriage mounted onsaid track, and an auxiliary hoist upon said carriage, said travelingcarriage being free to travel to variably position the auxiliary hoistupon either side of the main hoist.

3. In a ladle crane, the combination with a movable trolley and a mainhoist carried thereby, of a substantially arcuate track carried by thetrolley, a traveling carriage mounted upon said track, and an auxiliaryhoist upon the carriage.

l. In a ladle crane, the combination with a movable trolley and a mainhoist carried thereby, of a substantially arcuate track suspended fromthe trolley, having the main hoist substantially vertically alined withits center, a carriage mounted to travel on said track, and an auxiliaryhoist upon the carriage.

In testimony whereof I afiix my signature in presence of two witnesses.

GEORGE A. TRUE.

Witnesses:

W. G. OPENBURGH, LoUIs H. OLFS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of I'atents, Washington, D. C.

